Silwex House Quaker Street, London, Extention

Planning permission - Alteration-extension - Restoration - Listed building - Grade II - Infrastructure - Conservation area - Non-designated heritage asset - Conservation area appraisal - S16 or s66 of the Planning (Listed Buildings and Conservation Areas) Act 1990 - S72 of the Planning (Listed Buildings and Conservation Areas) Act 1990 - Identification of building as positive contributor to a conservation area - Extent or nature of setting - Weight to be given to asset’s conservation - Weight of impact on non - Designated heritage asset - Design responding to local character - Less than substantial harm through physical impact -Less than substantial harm through development affecting the setting - Optimum viable use - Viable use consistent with conservation - Economic benefits weighed against heritage conservation - Presumption in favour of sustainable development